The project focused particularly on two unused tunnels that could lessen traffic aboveground and give pedestrians faster routes to key destinations. The plan for the subterranean tunnels is in some ways similar to DC proposals for the Chesapeake and Ohio Canal in Georgetown or the Dupont Underground, both of which would provide public art and creative space for performances and events. Kinetic pavers like those proposed for a small park on Dupont Circle would power the London project.

“These underground spaces would be activated by stalls and other commercial and cultural uses helping pay for the project, as well as making them safe and attractive,” the London Planning Awards said of the Underline proposal, which has already been mocked for its ambition by London newspapers.